BRISBANE'S marquee signing Jack Bird is in doubt for round one with the 22-year-old booked in for surgery today.
Bird will head under the knife to fix ligament damage in his shoulder which will sideline him for three to four months.
Bird travelled to Brisbane last week to meet with their medical team when it was decided the injury needed addressing.
Brisbane high performance manager Jeremy Hickmans revealed to foxsports.com.au that the NSW Origin star needs a partial reconstruction.
The 22-year-old damaged his shoulder late in the season while playing Canberra, while he returned to finish the year the damage requires surgery to fix.
"He's got some ligament damage in his shoulder,” Hickmans said.
"We're not 100 per cent sure how it came about. The timeline with him having been at a different club, it could've been exacerbated through the finals.
"We brought him in for a check-up and we feel it's something that needs doing.
"We don't have 100 per cent (clarity on how bad it is) until he gets the surgery and we'll get a lot more details on it that way.
"We're looking at those three to four months which will take us through to the start of the season.”
The Broncos kick their season off against St George Illawarra on March 8 at UOW Jubilee Stadium.
A Dragons junior, Bird climbed the ranks including the NYC before moving to the Sharks where he made his first grade debut.
Bird signed a three-year-deal with the Broncos back in April worth almost $1 million a season.
As their star signing, the Broncos medical staff are hopeful the will be fully fit to take the field in the season opener but the trials look unlikely.
"We'll know after surgery (on Thursday),” Hickmans said.
"We're probably planning on him being available for round one. If we get any trials in that will be a bonus.”
The 2015 Dally M rookie of the year was reluctant to have the surgery, not wanting to sacrifice his first pre-season with the club for rehab.
However after officials insisted he have the operation, Hickmans is confident Bird's 2018 season will benefit in the long run.
"Initially it will,” Hickmans said when asked if the surgery will impact on his pre-season preparations.
"That was one of Jack's biggest concerns when he came up. He wanted to come to a new club and be in the best possible shape he can. That was one of the reasons we did our in-depth check with him.
"In the long-term it's going to be better for him and that's the conversation we had.
"He wasn't too keen to do it coming to a new club but it needed doing so we'll get it done and bite the bullet.
"The good thing with shoulders is you can get running pretty quickly. Getting that running volume and fitness, we can do that. He was pretty limited in the gym as it was so we'll be able to chase that in time.”
Bird is expected to play lock for the Broncos next year although can play fullback, centre and five-eighth.